Join Date: Dec 2009
Location: Dallas-Fort Worth Area
The detachments only get the stand and shoot and countercharge benefits when their parent units are charged and not the reverse.
The razor standard and similar normal augments, however, do not pass from the parent to the detachments. However, a battle prayer cast by a warrior priest or arch lector in the parent unit on the parent unit does pass on to the detachments within 3" of the parent.
Detachments within 3" of their parent units (now called regiments) only get the "psychology" and leadership benefits of the parent as long as the parent unit is not fleeing. That includes" frenzy, immune to psych, stubborn, steadfast (kind of tricky on this one), hold the line, and hatred (also stupidity). They also can borrow the leadership of the parent unit and get the augments of any battle prayers cast on the parent unit. Detachments cannot be more than half the number of models of the parent unit (rounding up).
I cannot find anything in the new rule book that says that parent units and other units ignore panic tests for fleeing detachments or destroyed detachments, so I believe that they removed that rule from the army book.